基于PLC控制的应急柴油发电机系统设计.doc

目录摘要通过对应急发电机自启动要求的分析,结合装备现状、配电系统的设计要求,利用 PLC (可编程控制器)现有设备控制的优势,提出了详细的设计思路和方案以供参考。在生产过程中突然停电,应急发电机立即给设备继续供电。应急电源原动机一般采用一***立冷却和供油系统的柴油机,并设有自启动装置,保证在主站失电后 0-45 秒内启动,应急电网通常为主电网的一部分,在正常情况下,这些用电设备由总配电板供电,只是在应急情况下由应急发电机组供电,因此在应急配电板上的应急发电机主开关与主开关向应急配电板供电的开关之间设有电气联锁,以保证安全。应急发电机组用 PLC (可编程控制器)控制有很多优点,它主要通过软件控制,从而省去了硬件开发工作,外围电路很少,大大提高了系统的可靠性与抗干扰能力;由于它简单易行的可编程序功能,无须改变系统的外部硬件接线,便能改变系统的控制要求,使系统的“柔性”大大提高。关键词: PLC ;应急柴油发电机;应急电网;自启动;梯形图;PLC 编程。 A bstract Since the launch of emergency generator based on the requirement analysis, equipment status, the design requirements of distribution system, using PLC (programmable controller) existing equipment control superiority, puts forward the detailed design ideas and solutions for reference. In the process of production, emergency generator electricity to power equipment immediately. Emergency power engine cooling and generally adopted an independent of diesel engine fuel system, and has since starting device, guarantee in station after losing electricity 0-45 目录 seconds, emergency power grid, as part of the usually under normal circumstances, the electric equipment of total power supply in emergency situations, but by emergency generator power in emergency switchboard, therefore the main switch and the emergency power supply switch to emergency switchboard between the switch to ensure safety interlocking, electrical. Emergency generator with PLC control has many advantages, it mainly through the control software, eliminating the hardware development, few buffer circuit, greatly improving the reliability and anti-interference ability of system, Because of its simple programmable functions, without changing the system, the hardware connection outside the control system can change, make system "soft" improve greatly. Keywords: PLC ; emergency diesel generator;emergency power ; self-starting and ladder diagram ; PLC programming. 目录摘要................................................................................................................